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Wyszukujesz frazę "durability of forging tools" wg kryterium: Wszystkie pola

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    Wyświetlanie 1-6 z 6
    Tytuł:
    Application of Artificial Neural Networks in the Analysis of Mechanisms Destroying Forging Tools
    Autorzy:
    Hawryluk, M.
    Mrzygłód, B.
    Gronostajski, Z.
    Głowacki, M.
    Olejarczyk-Wożeńska, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/353528.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    decision support system
    durability of forging tools
    artificial neural network
    loss of material
    wear
    Opis:
    This article discusses the results of studies using the developed artificial neural networks in the analysis of the occurrence of the four main mechanisms destroying the selected forging tools subjected to five different surface treatment variants (nitrided layer, pad welded layer and three hybrid layers, i.e. AlCrTiSiN, Cr/CrN and Cr/AlCrTiN). Knowledge of the forging tool durability, needed in the process of artificial neural network training, was included in the set of training data (about 800 records) derived from long-term comprehensive research carried out under industrial conditions. Based on this set, neural networks with different architectures were developed and the results concerning the intensity of the occurrence of thermal-mechanical fatigue, abrasive wear, mechanical fatigue and plastic deformation were generated for each type of the applied treatment relative to the number of forgings, pressure, friction path and temperature.
    Źródło:
    Archives of Metallurgy and Materials; 2020, 65, 1; 193-200
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of a Method for Tool Wear Analysis Using 3D Scanning
    Autorzy:
    Hawryluk, M.
    Ziemba, J.
    Dworzak, Ł.
    Powiązania:
    https://bibliotekanauki.pl/articles/221702.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    3D scanning
    measurements and volumetric analysis of tools wear
    improve a durability of forging tools
    Opis:
    The paper deals with evaluation of a 3D scanning method elaborated by the authors, by applying it to the analysis of the wear of forging tools. The 3D scanning method in the first place consists in the application of scanning to the analysis of changes in geometry of a forging tool by way of comparing the images of a worn tool with a CAD model or an image of a new tool. The method was evaluated in the context of the important measurement problems resulting from the extreme conditions present during the industrial hot forging processes. The method was used to evaluate wear of tools with an increasing wear degree, which made it possible to determine the wear characteristics in a function of the number of produced forgings. The following stage was the use it for a direct control of the quality and geometry changes of forging tools (without their disassembly) by way of a direct measurement of the geometry of periodically collected forgings (indirect method based on forgings). The final part of the study points to the advantages and disadvantages of the elaborated method as well as the potential directions of its further development.
    Źródło:
    Metrology and Measurement Systems; 2017, 24, 4; 739-757
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Impact of Tool Magnetization on Changes in the Surface Layer of Forging Tools
    Autorzy:
    Zwierzchowski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/351493.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    hot die forging
    wear mechanism
    magnetic field
    durability
    Opis:
    The paper presents a description of the phenomena occurring on the surface of the forging dies. A detailed analysis was made of 24 pre-forging dies due to the most intensive wear in this operation. To compare the results, new tools were also analysed. The research described in the study showed that the most dangerous factor for the hot forging process analysed is thermal-mechanical fatigue, which causes small cracks, which in turn quickly leads to the formation of a crack network on the entire contact surface of the tool with forged material. The second phenomenon is the tempering of the surface of the material for a long-term temperature effect. The presence of hard iron oxides in the form of scale from forging material is the accompanying phenomenon that intensifies the processes of tool wear. The paper presents the results of the analysis of the presence of residual magnetic field for forging tools and the results of laboratory tests of wear processes of tool steels for hot work in the presence of a magnetic field and in the presence of scale.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 1; 317-324
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Use of 3D Scanning Methods to Evaluate the Hybrid Layer Used in Forging Tools in Order to Improve their Durability
    Autorzy:
    Gronostajski, Z.
    Hawryluk, M.
    Kaszuba, M.
    Widomski, P.
    Ziemba, J.
    Smolik, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/355972.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    forging process
    destructive phenomena
    durability of tools
    scanning
    hybrid layers
    Opis:
    This study is focused on tools used in the industrial process of hot forging of a front wheel forging (gear wheel) manufactured for the automotive industry. Five different variants were applied for the tools: 3 die inserts were coated with three different hybrid layers (PN + PVD type), i.e. AlCrTiN, AlCrTiSiN and CrN, one insert was only nitrided, and one was pad welded, to improve tool durability. The tool wear was analysed and represented by the material degradation on the working surface, based on the 3D scanning and the material growth of the periodically collected forgings. Additionally, the scanned tools were divided into two areas, in which it was found, based on the analysis, that various degradation mechanisms are predominant. Microstructural tests and hardness measurements of the analyzed tools were also performed. Based on the results, it was found that, in the central part of the die insert, thermo-mechanical fatigue, abrasive wear and plastic deformation occurred, while in the area of the bridge insert, only abrasive wear could be observed. For these areas, the loss of material was determined separately. It was established that the use of the GN+CrN and GN+AlCrTiN hybrid layers on forging tools improves their durability, while the best results in the central area were observed on the tool with the GN+CrN layer, which is the most resistant to thermo-mechanical fatigue. In the second analyzed area, good wear resistance occurred on GN+CrN, GN+AlCrTiN and pad welded inserts, for which, together with the increase of the forging number, a proportional, slight growth of the loss of material occurred.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 3; 1549-1558
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improvement of Tools Durability by Application of Hybrid Layer of Nitrided/PECVD Coating
    Poprawa trwałości narzędzi poprzez zastosowanie warstw hybrydowych azotowanie/PEC VD
    Autorzy:
    Gronostajski, Z.
    Kaszuba, M.
    Paschke, H.
    Zakrzewski, T.
    Rogaliński, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/356165.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    forging
    tools
    nitride
    PVD
    CVD
    kucie
    narzędzia
    azotek
    technologie hybrydowe azotowanie/PECVD
    Opis:
    In the process of die hot forging the tools are subjected to three main factors leading to their destruction: the intensive thermal shocks, cyclically variable mechanical loads and intensive friction. The above mentioned factors causing destruction in the process of hot forging and warm forging concern mainly the surface of tools. Hybrid technique nitrided/PECVD belong to the latest methods of modifying the properties of the surface layer. In the paper the application of this technique for forging tools of constant velocity joint body is presented. The durability of the new tools is much better than the tools applied so far.
    W procesach kucia matrycowego na gorąco narzędzia poddawane są działaniu trzech głównych czynników powodujących ich niszczenie, tj. intensywnym szokom cieplnym, cyklicznie zmiennym obciążeniom mechanicznym oraz intensywnemu tarciu. Wymienione czynniki powodują zniszczenie głównie warstwy powiedzeniowej narzędzi, dlatego poszukuje się nowych metod podnoszących trwałość tej warstw. Jednym z rozwiązań jest stosowanie technologii hybrydowych azotowanie/PECVD. W pracy przedstawionozastosowanie takich warstw na narzędzia do kucia przegubów homokinetycznych. Badania wykazały, że narzędzia z warstwami hybrydowymi mają większą trwałość niż dotychczas stosowane.
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 3A; 1609-1615
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wear Mechanisms Analysis of Dies Used in the Process of Hot Forging a Valve Made of High Nickel Steel
    Autorzy:
    Hawryluk, M.
    Gronostajski, Z.
    Kaszuba, M.
    Krawczyk, J.
    Widomski, P.
    Ziemba, J.
    Zwierzchowski, M.
    Janik, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/351102.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    tool wear
    tools durability
    destructive mechanisms
    valve engine
    high nickel steel
    Opis:
    The study presents a durability analysis of dies used in the first operation of producing a valve-type forging from high nickel steel assigned to be applied in motor truck engines. The analyzed process of producing exhaust valves is realized in the forward extrusion technology and next through forging in closed dies. It is difficult to master, mainly due to the increased adhesion of the charge material (high nickel steel) to the tool’s substrate. The mean durability of tools made of tool steel W360, subjected to thermal treatment and nitriding, equals about 1000 forgings. In order to perform a thorough analysis, complex investigations were carried out, which included: a macroscopic analysis combined with laser scanning, numerical modelling by FEM, microstructural tests on a scanning electron microscopy and light microscopy (metallographic), as well as hardness tests. The preliminary results showed the presence of traces of abrasive wear, fatigue cracks as well as traces of adhesive wear and plastic deformation on the surface of the dies. Also, the effect of the forging material being stuck to the tool surface was observed, caused by the excessive friction in the forging’s contact with the tool and the presence of intermetallic phases in the nickel-chromium steel. The obtained results demonstrated numerous tool cracks, excessive friction, especially in the area of sectional reduction, as well as sticking of the forging material, which, with insufficient control of the tribological conditions, may be the cause of premature wear of the dies.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 4; 1963-1974
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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